Hundreds of fans were quick to label the incident a complete shocker, with many left dumbfounded by the fact they missed it themselves.

However, others have since worked out it is actually an optical illusion. The suggestion is the touchline is hidden from viewers in the shadow while the outer white line is actually the top of the Cardiff City Stadium advertising hoardings.

Some thought the throw-in had been taken from 10 yards in-field because of the shadows....